For each of the following, find E f dA. a) f(x, y) = cos(3x2 + y2) and
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a) f(x, y) = cos(3x2 + y2) and E is the set of points satisfying x2 + y2/3 < 1.
b) f(x, y) = y√x - 2y and E is bounded by the triangle with vertices (0, 0), (4, 0),and (4, 2).
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